Specifications:  Inner core: Cortex-M3 32-bit RISC;  Working frequency: 72MHz, 1.25 DMIPS / MHz; Working voltage: 2-3.6V;  Package: LQFP64; I / O port: 51;  Storage resources: 256kB Flash, 48kB RAM;  Interface resources: 2 x SPI, 5 x USART, 2 x I2S, 2 x I2C;  1 x SDIO, 1 x USB, 1 x CAN;  Analog-to-digital conversion: 3 x AD (12 bits, 1us, 16 channels in time sharing), 2 x DA (12 bits);  Debug download: Support JTAG / SWD interface debug download, support IAP.  2. Power supply: 5VDC power supply or USB power supply;  3. Debug port: JTAG / SWD mode (JTAG is used in the case of multiplexed debug pins), supports online download and simulation;  4. USB serial port download: the onboard CP2102 imported USB to serial downloader can directly download HEX files for easy use;  5. E2ROM: interface I2C;  6. Crystal: 8M main chip clock, one RTC clock chip each;  7. SD card socket: MINISD card, SPI interface mode;  8. LCD screen: 2.8-inch TFT touch screen with multi-function adapter board;  9. Two USB interfaces: one for USB to serial port and one for USB communication port;  10. Wireless transparent transmission interface: connect 433M wireless serial transparent transmission module to realize wireless data exchange;  11. Camera interface: a 30W pixel camera OV7670 with a fifo module interface, a 30W HD camera OV7725 or a 200w camera OV2640 camera interface;  12. Chip IO lead-out interface: All IO lead-outs are convenient for use;  13. External power supply interface: provides external 3.3V and 5V power, which can supply power to external devices or PCB boards; 14. Buttons: one reset button and two customer buttons;  15. BOOT jumper: used when downloading and running the program;  16. LED lights: 3, can realize functions such as frame signal indication and marquee.    Note:  In addition to the basic functions of the general development boards on the market, this development board highlights the important features of STM32 in image acquisition, display and transmission. This version has been carefully designed and improved by the research and development team, and has been exhausted, more complete, and the most complete. Use all the resources of RTC6 to focus 2 cameras on one board.    Package Included:  1 x Development Board;  1 x Cable